According to the pipe material (that is, steel), steel pipe can be divided into: carbon pipe and alloy pipe, stainless steel pipe, etc.

Carbon tube can also be divided into ordinary carbon steel pipe and high quality carbon structure pipe.

Alloy tube can be divided into: low alloy tube, alloy structure tube, high alloy tube, high strength tube. Bearing tube, heat and acid resistant stainless tube, precision alloy (such as removable alloy) tube and high temperature alloy tube.

Connection type classification

According to the connection method of pipe end, steel pipe can be divided into: light pipe (pipe end without thread) and wire pipe (pipe end with thread).

Wire pipe is divided into: ordinary wire pipe and pipe end thickened wire pipe.

Thickening wire tube can also be divided into: external thickening (with external thread), internal thickening (with internal thread) and internal and external thickening (with internal and external thread), etc.

According to the thread type, the wire pipe can also be divided into ordinary cylindrical or taper thread and special thread.

In addition, according to the needs of users, the wire pipe is generally equipped with pipe fittings for delivery.